I have completed my trademark registration, can I make any changes or alterations?

Once a trademark application has been filed it is not possible to make any changes to the submitted trademark in any way, you will have to file a new application to cover the new versions of the mark.
This includes adding any categories to cover more goods or services. When applying for your first application, take time to consider any future endeavours you may plan on taking to ensure that you can cover all of your potential options.